US2025188305A1PendingUtilityA1
Laminated body, packaging body, and method for producing laminated body
Est. expiryMar 16, 2042(~15.6 yrs left)· nominal 20-yr term from priority
C08J 2323/12C08J 2429/04C08J 7/048C09D 123/12C09D 7/61B32B 2307/7244B32B 2307/7376B32B 2255/28B32B 2255/26B32B 2255/06B32B 2255/10B32B 2439/70B32B 15/085B32B 15/20C09D 129/04B32B 27/32
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Claims
Abstract
The present invention addresses the problem of providing: a laminated body which includes a polyolefin resin substrate, is dense, and has good barrier properties; a packaging body; and a method for producing the laminated body. The solution to this problem is a laminated body comprising a polyolefin resin film, a metal layer and/or an inorganic compound layer, and a coating layer being disposed in this order on at least one surface of the polyolefin resin film. The ratio P1/P2 between peak intensities P1 and P2 is 3.5-8.0, the peak intensities being determined by measurement with a FT-IR-ATR method. P1 is the intensity of the greatest peak present in the 1,050 to 1,080 cm −1 range; and P2 is the intensity of the greatest peak present in the 920 to 970 cm −1 range.
Claims
exact text as granted — not AI-modified1 . A laminated body comprising an inorganic layer on at least one surface of a polyolefin-based resin film,
wherein one or more of the inorganic layers each have a metal layer and/or an inorganic compound layer, and a value of a ratio P1/P2 of the following peak intensities P1 and P2 is 3.5 or more and 8.0 or less, the peak intensities being detected by measuring at least one outermost layer (hereinafter, referred to as a coating layer) of the laminated body by a FT-IR-ATR method (total reflection Fourier transform infrared spectroscopy):
P1: an intensity of a maximum peak present at 1,050 to 1,080 cm −1
P2: an intensity of a maximum peak present at 920 to 970 cm −1 .
2 . The laminated body according to claim 1 , wherein the coating layer contains a water-soluble resin and a hydrolysate of a metal alkoxide and/or a polycondensate thereof.
3 . The laminated body according to claim 1 , wherein a change amount Δ(P1/P2) of the value of the ratio P1/P2 of the following peak intensities P1 and P2 detected by analyzing the coating layer by a FT-IR-ATR method before and after a heat treatment at 120° C. for 1 minute is −0.5 or more and 0.5 or less.
4 . A laminated body comprising one or more inorganic layers on at least one surface of a polyolefin-based resin film,
wherein the one or more inorganic layers each have a metal layer and/or an inorganic compound layer, at least one outermost layer (hereinafter, referred to as a coating layer) of the laminated body contains one or more segments selected from a segment derived from a vinyl alcohol-based resin, a segment derived from a polysaccharide, and a segment derived from an acrylic polyol resin, and a segment having a Si—O bond and a metal element M other than silicon Si, and a ratio m/s of a peak intensity m of fragment ions derived from the metal element M and a peak intensity s of fragment ions derived from the segment having a Si—O bond is 0.05 or more and 10.00 or less, the peak intensities being measured by a time-of-flight secondary ion mass spectrometer (TOF-SIMS) under the following measurement conditions at a center part of a thickness of the coating layer:
<Measurement Conditions>
Primary ion species: Bi + (2 pA, 50 μs)
Acceleration voltage: 25 kV
Detected ion polarity: positive
Measurement range: 100 μm×100 μm
Resolution: 128×128
Etching ion species: O 2+ (2 keV, 170 nA)
Etching area: 300 μm×300 μm
Etching rate: 1 sec/cycle.
5 . The laminated body according to claim 4 , wherein the metal element M contained in the coating layer contains at least one metal element of aluminum, titanium, and zirconium.
6 . The laminated body according to claim 1 , wherein a ratio c/s of a peak intensity c of fragment ions derived from carbon and a peak intensity s of fragment ions derived from the segment having a Si—O bond is 0.015 or more and 0.650 or less, the peak intensities being measured by a time-of-flight secondary ion mass spectrometer (TOF-SIMS) at a center part of a thickness of the coating layer.
7 . The laminated body according to claim 1 , wherein the laminated body satisfies SF 145° C. −SF 121° C. ≤2.50 MPa, where a stress at 121° C. in a main orientation axis direction and a stress at 145° C. in the main orientation axis direction, measured by thermomechanical analysis (TMA), are denoted respectively by SF 121° C. and SF 145° C. .
8 . The laminated body according to claim 1 , wherein tan δ of the main orientation axis direction at 145° C. is 0.25 or less.
9 . The laminated body according to claim 1 , wherein when an elongation at break of the main orientation axis direction is denoted as T 0 and an elongation at break of the main orientation axis direction as measured after the laminated body is heat-treated at 130° C. for 10 minutes is denoted as T 130 , a value of T 0 /T 130 is 1.20 or less.
10 . The laminated body according to claim 1 , wherein a free volume radius of pores in the coating layer is 0.260 nm or less, the free volume radius being determined by a positron annihilation method under the following measurement conditions:
<Measurement Conditions>
Sample pretreatment: The laminated body is attached to a silicon wafer of 15 mm×15 mm and vacuum degassed at 25° C.
Positron source: 22 Na-based positron annihilation
γ-ray detector: Scintillator made of BaF 2 and photomultiplier tube
Beam intensity: 3 keV
Measurement temperature: 25° C.
Measurement atmosphere: Vacuum
Total number of counts: About 5,000,000 counts
The obtained positron annihilation lifetime curve is subjected to a three-component analysis by nonlinear least squares program POSITRONFIT to determine τ1, τ2, and τ3 from those having a small annihilation lifetime;
from the longest average annihilation lifetime τ3, the free volume radius R3 (nm) of pores is calculated using the following formula:
τ3
=
(
1
/
2
)
[
1
-
{
R
3
/
(
R
3
+
0.166
)
}
+
(
1
/
2
π
)
sin
{
2
π
R
3
/
(
R
3
+
0.166
)
}
]
-
1
11 . The laminated body according to claim 1 , wherein the polyolefin-based resin film contains polypropylene.
12 . The laminated body according to claim 1 , wherein a thickness of the coating layer is 200 nm or more and 600 nm or less.
13 . The laminated body according to claim 1 , wherein the metal layer or the inorganic compound layer contains aluminum.
14 . The laminated body according to claim 1 , wherein a water vapor transmission rate of the laminated body is 1.0 g/m 2 /24 hr or less and an oxygen transmission rate of the laminated body is 1.0 cc/m 2 /24 hr or less.
15 . The laminated body according to claim 1 , wherein the metal layer or the inorganic compound layer has direct contact with the polyolefin-based resin film.
16 . A packaging body comprising the laminated body according to claim 1 .
17 . A method for producing a laminated body having an inorganic layer on at least one surface of a polyolefin-based resin film, the producing method of forming a coating layer on a surface of the laminated body having an inorganic layer, the producing method comprising:
a step of applying a coating agent containing a water-soluble resin and a hydrolysate of a metal alkoxide and/or a polycondensate thereof; and a step of drying the coating agent, wherein a value of a ratio P1/P2 of the following peak intensities P1 and P2 is 3.5 or more and 8.0 or less, the peak intensities being detected by measuring the coating layer by a FT-IR-ATR method (total reflection Fourier transform infrared spectroscopy):
P1: an intensity of a maximum peak present at 1,050 to 1,080 cm −1
P2: an intensity of a maximum peak present at 920 to 970 cm −1 .
18 . A method for producing a laminated body, the producing method comprising:
a step of applying a coating agent containing one or more selected from silicon alkoxide, a hydrolysate of silicon alkoxide, and a polycondensate of a hydrolysate of silicon alkoxide, one or more resins selected from a vinyl alcohol-based resin, a polysaccharide, and an acrylic polyol resin, and a compound containing a metal element M other than silicon Si to at least one outermost layer on an inorganic layer side of a laminated body having a polyolefin-based resin film and one or more inorganic layers; and a step of drying the coating agent, wherein a ratio m/s of a peak intensity m of fragment ions derived from the metal element M and a peak intensity s of fragment ions derived from a segment having a Si—O bond is 0.05 or more and 10.00 or less, the peak intensities being measured for a film obtained by applying and drying the coating agent by a time-of-flight secondary ion mass spectrometer (TOF-SIMS).
19 . The method for producing a laminated body according to claim 17 , wherein the producing method comprises a step of applying a coating agent containing one or more selected from silicon alkoxide represented by Si(OR) 4 , a hydrolysate of silicon alkoxide represented by Si(OR) 4 , and a polycondensate of a hydrolysate of silicon alkoxide represented by Si(OR) 4 , one or more resins selected from a vinyl alcohol-based resin, a polysaccharide, and an acrylic polyol resin, and a compound containing a metal element M other than silicon Si to at least one outermost layer on an inorganic layer side of a laminated body having a polyolefin-based resin film and one or more inorganic layers, and a step of drying the coating agent:
R: Alkyl group.
20 . The method for producing a laminated body according to claim 17 , wherein a ratio c/s of a peak intensity c of fragment ions derived from carbon and a peak intensity s of fragment ions derived from a segment having a Si—O bond is 0.015 or more and 0.650, the peak intensities being measured for a film obtained through the step of applying a coating agent and the step of drying the coating agent by a time-of-flight secondary ion mass spectrometer (TOF-SIMS).Join the waitlist — get patent alerts
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